• 1. defenseless a: 无防备的
• 2. a defenseless city: 不设防的城市

• 1.AIDS is a disease that breaks down the body immune system and leaves a person defenseless against infections and illnesses.
  艾滋病是一种破坏人体免疫系统，使人处于失去抗感染、抗疾病状态的病症。
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• 2.AIDS is a disease that breaks down the body's immune system and leaves a person defenseless against infections and illnesses.
  艾滋病是一种破坏人的免疫系统使人体对感染及疾病没有抵抗力的疾病。
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• 3.Through popularizing the belief that worst cases are normal, it incites people to feel defenseless and vulnerable to a wide range of future threats.
  通过普及最坏情况会经常发生这种信仰，煽动人们对将来的威胁感到无助和脆弱。
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